Butsuri
Online ISSN : 2423-8872
Print ISSN : 0029-0181
ISSN-L : 0029-0181
Search
Advanced search
OR
Browse
Search
Current issue
Displaying 1-20 of 20 articles from this issue
Show all abstracts
    • |<
    • <
    • 1
    • >
    • >|
Preface
Contents
Researches
  • Probing Star Formation Activity in the First Galaxies with James Webb Space Telescope
    Kohei Inayoshi
    Article type: Researches
    2024 Volume 79 Issue 4 Pages 170-174
    Published: April 05, 2024
    Released on J-STAGE: April 05, 2024
    DOIhttps://doi.org/10.11316/butsuri.79.4_170
    JOURNAL RESTRICTED ACCESS
    Show abstractHide abstract

    Early results from the James Webb Space Telescope have revealed bright and distant galaxies in greater numbers than expected. In this article, I discuss how the statistical properties of this newly discovered galaxy population improve our understanding of galaxy assembly history, star formation activity, and stellar population in the distant universe.

    View full abstract
    Download PDF (3274K)
  • Polymer Crystallization Process with Small Crystalline Aggregation
    Takashi Konishi, Yoshihisa Miyamoto
    Article type: Researches
    2024 Volume 79 Issue 4 Pages 175-180
    Published: April 05, 2024
    Released on J-STAGE: April 05, 2024
    DOIhttps://doi.org/10.11316/butsuri.79.4_175
    JOURNAL RESTRICTED ACCESS
    Show abstractHide abstract

    The isothermal polymer crystallization near the glass transition temperature has been studied by wide-angle x-ray diffraction (WAXD), small-angle x-ray scattering (SAXS), and optical microscopy. The SAXS and WAXD results show the polymer crystallization proceeds with the nodular aggregation. The analysis of the SAXS results using Kolmogorov–Johnson–Mehl–Avrami theory indicates that the formation kinetics of the aggregation regions is of homogeneous nucleation type. The temperature dependences of the growth velocity and the nucleation rate of the aggregation region are a natural extrapolation of that of spherulite to the high supercooling region. This surprising results may require the construction of a new nucleation theory.

    View full abstract
    Download PDF (1399K)
  • High-Energy Neutrinos from the Galactic Plane
    Naoko Kurahasi Neilson, Aya Ishihara
    Article type: Researches
    2024 Volume 79 Issue 4 Pages 181-185
    Published: April 05, 2024
    Released on J-STAGE: April 05, 2024
    DOIhttps://doi.org/10.11316/butsuri.79.4_181
    JOURNAL RESTRICTED ACCESS
    Show abstractHide abstract

    The Milky Way, the largest feature in the sky, has been studied by humans for millennia, always observed in light or other wavelengths of the electromagnetic spectrum. For the first time, the IceCube collaboration has observed the Milky Way in high energy neutrinos. The observation of our Galaxy comes after observations of extragalactic neutrinos. Galactic neutrinos are difficult to observe at IceCube for two reasons; most of the emission is in the Southern sky and has a softer energy spectrum. To overcome this, a novel analysis was developed. A feat of innovative data analysis by using data previously thought unusable provided a milestone observation in multi-messenger astronomy.

    View full abstract
    Download PDF (3828K)
  • Designing High-Density Magnetic-Skyrmion-Hosting Materials with Giant Emergent Electromagnetic Response
    Takashi Kurumaji, Yoshinori Tokura
    Article type: Researches
    2024 Volume 79 Issue 4 Pages 186-191
    Published: April 05, 2024
    Released on J-STAGE: April 05, 2024
    DOIhttps://doi.org/10.11316/butsuri.79.4_186
    JOURNAL RESTRICTED ACCESS
    Show abstractHide abstract

    Magnetic skyrmions, characterized as topological spin defects, have attracted widespread interest owing to the emergent electrodynamics that promises innovative application in novel spintronic devices. Our novel approach for material design has led to the discovery of the triangular-lattice formation of magnetic skyrmions in rare-earth intermetallics Gd2PdSi3. We have identified large amplification of the topological Hall signal, a phenomenon stemming from the confined emergent magnetic fields inherent to densely packed, miniaturized skyrmions. This pioneering development in material design has ignited a fervent quest for new skyrmion-hosting materials in frustrated magnets.

    View full abstract
    Download PDF (2890K)
    • |<
    • <
    • 1
    • >
    • >|
feedback
 Top